摘要
准确计算导体温度是实现海缆温度监测的重要条件。针对三芯光电复合海缆,通过分析各层结构热阻对导体温度的影响,发现绝缘层热阻变化影响最大,进而提出一种利用电流差和导体温度差修正绝缘层热阻的方法。实际工况中无法直接获取导体温度,故利用BOTDA实测得光纤温度,通过有限元分析出光纤与导体温度变化量对应关系,从而得导体温度差。再将修正后的热阻代入计算,通过对比发现修正绝缘层热阻能够提高导体暂态温升计算的准确性。
Accurately calculating the conductor temperature is an important condition for monitoring the temperature of the submarine cable. For thethree-core photoelectric composite cable, by analyzing the influence of the thermal resistance of each layer on the temperature of the con-ductor, it is found that the thermal resistance of the insulation layer has the greatest impact, and then proposes a method of correcting thethermal resistance of the insulating layer by using the current difference and the conductor temperature difference. The conductor tempera-ture cannot be directly obtained in actual conditions. Therefore, the actual temperature of the optical fiber is measured by the BOTDA, andanalyzes the corresponding relationship between the temperature variation of the optical fiber and the conductor through finite element anal-ysis, and obtains the conductor temperature difference. Then the corrected thermal resistance is substituted into the calculation. It is foundthrough comparison that correcting the thermal resistance of the insulating layer can improve the accuracy of the transient temperature risecalculation of the conductor.
作者
潘梦琦
唐永卫
陈元林
卢学佳
PAN Meng-qi;TANG Yong-wei;CHEN Yuan-lin;LU Xue-jia(College of Information Engineering,Shanghai Maritime University,Shanghai 201306;State Grid Hengshui Electric Power Supply Company,Hengshui 053000;Jiangsu Haishang Longyuan Wind Power Co.,Ltd.,Nantong 226408)
关键词
导体暂态温升
热路法
高压三芯光电复合海缆
绝缘层热阻
有限元
Conductor Transient Temperature Rise
Thermal Circuit Method
High-Voltage Three-Core Photoelectric Composite Cable
InsulationThermal Resistance
Finite Element
